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Practical articles on standards, audits and the Cornerstone platform — written by the team that implements them.
Go / No-Go Checks: A Free Printable PASS or FAIL Tool
A free printable Go / No-Go tool that gives instant PASS or FAIL results and prints your limits for the line.
Rob Low
Cornerstone team
Free Tools
13 Oct 2026 · 2 min read
Tolerance Calculator: Set Min and Max Limits Without Errors
Free tolerance calculator that turns a nominal value and tolerance into minimum and maximum limits, and why clear limits matter on site.
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Free Tools
12 Oct 2026 · 2 min read
SG Cup Calibration: How to Calibrate a Density Cup
How to calibrate an SG density cup using water, and a free tool that works out your correction factor from the water temperature.
Read more11 Oct 2026 · 2 min read
Process Capability Calculator: Cp and Cpk Made Simple
Free process capability calculator for Cp and Cpk, with a plain English explanation of what the numbers mean and when to act.
Read more10 Oct 2026 · 2 min read
Gage R&R Calculator: Is Your Measuring System Good Enough?
A free quick Gage R&R calculator that estimates %GRR and number of distinct categories, with plain English guidance on the verdicts.
Read more9 Oct 2026 · 2 min read
OEE Calculator: Free Tool and What a Good Score Really Means
A free OEE calculator for availability, performance and quality, plus what a good score is and how to use it to find lost time on your line.
Read more8 Oct 2026 · 2 min read
AQL Calculator: Free Sample Sizes and Accept Reject Points
Use a free AQL calculator to get the sample size and accept and reject numbers from your lot size and AQL, and learn where sites go wrong.
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Free Tools
7 Oct 2026 · 3 min read
UK Three Packers Rules Explained, With a Free Checker
The UK three packers rules explained in plain English, with a free weights and measures checker to test your own fill samples.
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